问题
选择题
| Tom worked very hard, _____ that he would be able to buy a car of his own in two years. |
A. hoped B. to hope C. hoping D. and hoping |
答案
答案：C
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| Tom worked very hard, _____ that he would be able to buy a car of his own in two years. |
A. hoped B. to hope C. hoping D. and hoping |
答案：C
重锤式上升极限位臵限制器简图，其中代号4表示的是（）。